Gloop

A heat wave has hit us, which sent us out into the yard, smoothies in hand, for a long evening. Clara giggled herself senseless running through the sprinklers, complete with footwear (she says that wet grass makes her feet itch).
Trevor, meanwhile, cooked up his weirdest building material to date: "Gloop".
You know those little pollen sacs that fall off trees after the pollen has all been released? Well, our lawn is covered with dead, brown pollen sacs from the mulberry trees. Trevi decided to collect them in a bucket, add water, and stir. The resulting slurry looked like this:
But why just swish the guck around in a pail, when you can scoop it out and fill plastic Easter eggs with it? If you pack enough gloop in there, you can form perfect little egg-shaped blobs.
Then, you can scatter the blobs all over the yard, and freak people out when they accidentally step on them.