Normally I don't give the boys anything to "do" when we go outside to play. They have the swing set at our house, and we are within walking distance of maw-maw and paw-paw's trampoline and farm. That is usually more than enough to occupy them.
However, the 2 year old received a bubble set as part of a gift for his birthday, and anyone with preschoolers knows that bubbles are fascinating. The big brother just couldn't wait to break it out!