K.J.
One of my favorite things to do with my 11 month old is just hold him tightly and do some wild dancing. He laughs hysterically and it gives me a good workout. And, it's something my 3 year old can join in on. I also like to help him make music by hitting wooden spoons on tupperware containers and pots (with lids on). Another thing he likes is when I hold his hand, like I am going to guide him with walking, and then walk really fast. His little legs start moving so quickly and he gets a huge kick out of it. I say "Run, run, run, run, run" and he and my 3 year old just crack up.