Mail Time

For Max's B-day he got a package from Grandma and Grandpa which he INSISTED on getting up the stairs and pulling in the living room himself. He got quite frustrated towards the end and finally allowed me to help bring it in and open it.
Then he was a happy boy!
What could it be??????
Fun puzzle, cars, and even
a fun new sprinkler!!!!! I'm sure we'll be using that one this summer.
Thanks grandma and grandpa Goodrich!