Net-style crochet projectile with water balloon liner. It burst after the first throw but, with a stouter balloon, and a few more near criminal run-on sentences like this one here, it may be able to last longer. It made a wonderfully spherical ball, the pattern's below.
1. Magic circle (6)
2. Chain 2 for the post up to the next row. Two are needed in the first chain to match the double crochet chain in subsequent posts in this row.