Walmart offers the Infantino Peek and Play Tummy Time Activity Mat, model no. 206-941, for $13.96. Choose free in-store pickup to dodge the $5.99 shipping charge. (Amazon offers it for the same price for Prime members.) That's tied with our mention from November and the lowest price we could find by $11. It features a textured monkey teether and crinkly elephant which purport to encourage reaching and grabbing. It also includes a large, removable mirror and padded bolster.