Grimm's 5-Piece Fire Element Flames Stacker is a clever and versatile wooden stacking and nesting puzzle, hand carved from a single piece of wood. These nesting caves represent the element of Fire. Made in Europe from solid wood, pieces are gently dyed with water-based, certified non-toxic orange, red and yellow stains. Each fiery block piece can be used as a bridge, tunnel, fence, or cave for little gnomes or fairies. It can be stacked like blocks or nested together as a puzzle. When not stacked, it is a great open-ended toy where children can create bridges, tunnels, small houses, and more. The possibilities are boundless when children are left to their own imagination. This Fire Flame Stacker pieces also make unique building blocks, especially when combined with other Grimm's Elements Stacker sets, available separately, including Rainbow, Water Waves, Stone Caves and Little Flower.