My only grandchild, (so far), is about 2-1/2, this past w/e, he entertained us with his 'antics' like you describe.
Funny thing is that when our kids were that age, we didn't always think the 'antics' were funny.
It's amazing what kids can come up with.
My daughter just got married this past w/e and I did a lot of flashbacks in my mind of her as a toddler. Her nephew, (my grandson), entertained all of us at the Wedding.
CHERISH what you have, they grow up soooo fast. - (Take LOTS of photos & Videos).
craigr