Thumb Score: +21 Walmart.com has Fisher-Price Train Inflatable Ball Pit (52" x 37" x 35") on sale for $19.98. Select free in-store pickup to save on shipping, otherwise shipping is free on orders $35 or more. Thanks TattyBear Note, availability for in-store pickup may vary by location. Amazon.com also has Fisher-Price Train Inflatable Ball Pit (52" x 37" x 35") on sale for $19.98.