Buy everyone a bottle of bubble solution and blow bubbles. Have a contest to blow the biggest bubbles. Catch the bubbles, break them, watch them soar away high in the sky. Teach the kids to bite the bubbles. This is fun and lots of laughs.
Bubbles are for everyone from babies to adults.
Being on a low-carb diet, I often have to shop there for ingredients, so it's dual purpose. We often go grocery shopping on Saturday, hitting the good sales in the paper. Picnic at a local arboretum. The new holiday also asks communities to set up free public events. It has attracted interest as far away as Japan.