I need some ideas. I dont think my kiddo is a genius, but my 1.5 year can say his A,B,Cs, count up to 20 trying to go to 30, and count back from 10. He is overly obsessed with learning numbers and letters. He says some words, tries to say sentences like saying the ending to the ABCs song. But his obsession is letters and numbers. I want to give him Christmas gifts that are educational and will keep him engaged. Any thoughts?