Nephew's Christmas present. Cash hidden in a glued shut wooden box encased in expanding foam. Obligatory red herring of trail mix on top. Try opening this gift in 2 seconds! : r/funny
Mini Air Handy Foam Room Temperature Expanding Foam Packaging Bags #10 (8 Pack) - Walmart.com
Sealed Air Instapak Quick RT #10 Heavy Duty Expandable Foam Bag, for 8"x8"x8" Box, Case of 180, Expandable Foam Packaging Bags for Shipping Boxes, 15"x18" - Walmart.com
Amazon.com : Sealed Air Instapak Quick RT #40 Heavy Duty Expandable Foam Bag, for 12"x12"x12" Box, Case of 224, Expandable Foam Packaging Bags for Shipping Boxes, 18"x24" : Office Products