Handing your little brother the answer isn’t helping. Sitting next to him while he figures it out is.

There are two kinds of help and only one of them leaves the other person stronger. Supplying the answer ends the discomfort immediately and removes the exact struggle that would have built the skill, while staying nearby while someone works is slower and much less satisfying to give. Impatience reliably picks the first.

The next time you are asked, sit down and stay quiet longer than is comfortable. Offer a hint rather than the solution and let them find the rest. Your presence is doing more for them than your answer would.