Medium or Large Cool-Aide Cooling Sports Towel (60% Off). Free Returns.  Medium towel is $5.99 and the large is $7.99.  Shipping is $2.99 flat rate for orders $14.99 and under; free above that amount.

These all-natural cooling towels instantly lower body temperatures up to 20 degrees without requiring refrigeration. To activate, first rinse the towel in cool water, then wring it and shake out the excess moisture. The highly absorbent fibers will deliver a cooling sensation that lasts up to two hours.

With young children who tend to overheat in the summer, these are definite must-haves.