If your kiddo's birthday falls in a warmer month, you're in luck: Parks, which are typically free to use for a party, are a big hit with the toddler set.
Find one with all the amenities, including a playground (which must be fully supervised, of course), picnic tables and bathrooms. Bring a cooler for snacks, juice and cake. Bring some cups and buckets if the playground has sand, and some extra sunscreen in case any of the parents forget. It's an easy, affordable way to show some little kids a great time.
Up next: An even easier (but slightly less affordable) way to play.