2.5 is not so old that he will be bored with just playing as long as you have some toys that are geared to his age (cars, trains, trucks, blocks, mega blocks, are great!). You will get to know him and his maturity level given a little time. Don't stress about teaching him everything at once...he still has a year and a half until he starts school and it depends on the child how much of that they are ready for at that age. You can also start simple with art time...let him colour with crayons or paint with brushes or try finger painting so he can explore his creative side. I'm not huge on complicated crafts where you have to do most of the work...I wonder what they really learn from that. Lots of outside active time will be a hit (think trips to the park or splash pad), so you are starting with him at a good time of the year. If the babies are still having morning naps, that could be a could time to spend time doing art or other learning activities with him, but don't force it...it's good for him to play on his own as well! Good luck!