• UNLEASH ARENA-SIZED THRILLS – Kids build and launch a pull-back monster truck with the LEGO Technic Monster Jam Grave Digger Fire and Ice (42219) building toy for boys and girls ages 7 years old and up • PULL-BACK ACTION – Young builders can pull back the truck and watch it race forward to recreate exciting Monster Jam stunts and tricks from the arena • AUTHENTIC DESIGN – This monster truck toy features authentic details from the real Grave Digger Fire and Ice truck with fire and flames on one side and an icy design on the other • PRETEND PLAY POSSIBILITIES – Kids can create their own imaginary Monster Jam events and adventures as they launch their truck into action • GIFT FOR BOYS & GIRLS – Makes a fun birthday present or holiday treat for kids who love Monster Jam trucks and STEM toys • A FUN WAY TO BUILD – The LEGO Builder app includes digital tools that let kids track progress, zoom in and rotate models using 3D instructions • DIMENSIONS – This 263-piece LEGO Technic set features a monster truck measuring over 4 in. (11 cm) high, 7 in. (18 cm) long and 4 in. (11 cm) wide