Madd Kidz: My First Trampoline Age: 3-8 years Turn your backyard into a jumping extravaganza with this enclosed, single-person trampoline. Protective foam padding and a full net enclosure ensure that young jumpers are safe while at play. It's constructed of quality materials and features a heavy-duty trampoline bed. Measures 55" x 55" x 71". Holds up to 150 pounds.