Ker-Pops Bubble Popping Sensory Fidget Mat – Costco Sale! by Rhonda November 25, 2022 *UPDATE* 11/25/22. Get popping with the Ker-Pops Bubble Popping Sensory Fidget Mat from Costco. This sensory toy has over 400 colorful bubbles of different sizes and thickness that make distinctive… 0 FacebookTwitterPinterestEmail