LeapFrog makes some fantastic “learning” toys – you might want to check them out. Do you have the magnet lets for the fridge? You put the letter into the holder and it does the sounds (phonic) and a little song, too.
Blocks, manipulative toys are great for this age. You can do many things, including start them on simple patterns (in school you’ll hear – ABABAB patterns – think red, green, red, green, red, green…or even AABBAABB or ABC….see how this works? They pick up on the patterns, quickly.) Chalkboards or dry erase boards, they usually love them! Dress ups…yes, even with boys. My son has a police uniform, fireman, Power Rangers, The Hulk….and so on. It’s creative and fun play.
My list is long! (I could go on and on.)