What should I do?

Should I be offended or thankful?
That's up to you to decide, how do you feel about it? What does your heart tell you?
I think it's a very kind and sweet gesture of these 2 guys. More people should be like this. :)

Offended? They are trying to help you. Accept the money and be thankful that they helped you.

But then on the flipside don't abuse the fact that they are trying to help you. Take the money, and be grateful - but don't leech off of them.

You don't mention the quality of your relationship with these 2 people. I'd hate to think that it's some sort of prank or taunt or something, but I've heard of worse. Assuming you're on friendly terms with these 2 people then I would absolutely accept the gift thankfully. It's kind of funny that you're asking this question on steamgifts :)

If you were in a position to help somebody else out then would you? How would you expect that person to feel?

Sometimes it is fine to help other people out. It doesn't have to be a big deal.

U should be thankful , they are awesome

"So they said that they raised 70 dollars" What does this mean?
They steal 70 dollars to give you or they give you 70 dollars?

If that is the first case i totally reject it. If is the second one, accept and be thankfull, and consider to give back in future if you can (not the money, a favor)

It's like giveaways.. While people create giveaways, they don't (or shouldn't) expect anything in return (otherwise it's no longer a giveaway but a trade), when we manage to win some game, we are happy and want to give back to the community to return the favor..

As for your situation, personally I would accept the offer only if I was sure that I can return the favor at some point in which case I would let them know that while I appreciate that they care and offer help, (which is what good and caring friends usually do and it's to be expected if you have good and caring friends), I will only accept it under one condition - that I will return the favor in one way or another at some point, such things help to build character and strengthen the friendships, otherwise I would thank them for caring and a nice offer, but would have to refuse and I would also explain why - because it's not easy for me to accept such a nice offer when I don't know for sure that I will be able to return the favor.

Then again, that's just me, like some other person pointed out, we can't tell you how to feel about this and naturally if what I said here doesn't appeal to you in any way, then you might want to make your own choice based on your personal feelings.

Of course you should be thankful! In some countries and cultures, people are ashamed of being poor, don't be(but at the same time don't brag around about it), be humble and take some of the money. Buy a training shoes, and give the change back. If they yet refuse the change and say to keep it, don't force and accept it. Make good use of it in respect for them.

Friends like that don't appear that easily. Keep them close to you, for whenever they need you, you are there to help them.

Hi Shim! How did it go? Let us know (if you want to). ^^

Hey Shim - you don't know me but I'm a mother and I can definitively state that what your friend and erst-while friend have done for you is a really nice thing. By accepting their gift you are allowing them to feel rich and good about themselves. Too often we forget that accepting a gift, while difficult for us personally, makes the gifter feel magnanimous. So yeah, let them buy you the shoes. Hopefully someday you can repay their gift. For now, being gracious is the best gift you can give them. :-)

"have basic entertainment"

Nig ga, have you EVER considered visiting your school library and furthermore if they close early visiting your town library?
god dammit mane I spent more than 5000 hours reading at my school and two local libraries since I was in junior highschool, and you know what?. I GOT ENTERTAINED and a lot and fucking hell I LEARNED a fuckload of interesting facts that make me understand a little more about myself and the world, and have many topics to comment about. Knowledge will take you to lots of interesting places.

Also always have hope the people around you are trying to be genuinely friendly and just want you to have nice shoes. Remember the balance between trust vs mistrusts is HOPE.

If anyone offers you something as a gift, it is best to accept it. Once it belongs to you, you may do as you like with it, including throw it away. It belongs to you. (You don't want to throw it away in front of the person who gave it to you.)

Beware, however, of people who give gifts with "strings attached." This kind of person confuses giving a gift with doing you a favor, and so gifts you with something so that you might "owe" them something in return. That is wrong, and it is bad (on their part). If someone ever tries to lay a "guilt trip" on you for something they gave you ("Hey! I gave you this gift! You owe me!), then offer to return the gift. The whole "strings attached" thing is rubbish and you owe nothing for receiving a gift.

Take it
It kinda monetary fund from UN for the developing country

take the shoes, lay low with any public spending you think might seem extravagant and as soon as you have enough funds take them out for a celebration of sorts - start of a great year, game victory, etc... Tell them the night is on you and go do something fun together. or donate some time and energy to helping some people in your class with stuff.

Take it with a good thought.

Ignore what other people think about it and accept the gift. I mean, they will be happy after you get the shoes. That's why people give games away here as well.

You should say no. Till you are part of a family you have to consider your actions may affect your whole clan.

As people said before it all depends on the situation, if they are your friends and truly raised the money to buy you shoes for the gym i think you can accept it. Selfless people are rare nowadays, especially in high school i'd say, it's good to see teenagers doing the right thing and being generous like that. But as Khalaq said don't let them remind you for the rest of the year how they helped with the shoes and be mean to you or asking you to do bad/weird things for them in exchange. If it's their state of mind politely decline.

If they do that as a way to tease or mock you just ignore them and move on. Don't take it personally though, people can be mean to others sometimes.

Regarding your family, they got pissed for people offering to buy you shoes, i'd say it's pride talking. Some people instead of accepting a helping hand will reject it as they may feel people are looking down on them for wanting to help. Anyway if they can slowly accept you got new shoes people offered you it's all good. But don't go into Cold War with your parents over this, except if you really don't have decent shoes anymore and really need some new ones.