From capsule dispensers to water reveals, unboxing toys are getting more extreme every year to kids’ delight.

This September, Be Amazing Toys! is launching Snow Pets, blind box collectibles that kids can reveal through a wintery reaction that sets off a mini-avalanche of overflowing snow.

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Snow Pets come from the winter wonderland of Snowy Falls, where new animal friends sleep inside their snowballs. Add water to create an eruption of snow that will reveal the mystery Snow Pet. Kids can collect the Snow Pets to create stories with other Snow Pet characters, use them as pencil toppers, and use the included snow for tactile play.

The debut series will include eight initial characters and eight rare icy pets, available on Amazon and in specialty toy stores on Sept. 1. An exclusive collection featuring ultra-rare gold editions will launch on Dec. 4 at Michaels.