HOBBY MODEL KIT – Unassembled model packed in an envelope with easy to follow instructions. Ideal for ages 14 and up. NO GLUE OR SOLDER NEEDED – Parts can be easily clipped from the metal sheets. Tweezers are the recommended tool for bending and twisting the connection tabs. MARS ROVER PERSEVERANCE & INGENUITY HELICOPTER – 4.5 Sheet Model with a challenging difficulty level. Assembled Size: Rover: 4.92 L x 3.54 W x 2.95 H inches. Helicopter: 1.02 L x 1.30 W x 0.79 H inches. 1:30 Scale. FROM STEEL SHEETS TO 3D – Pop out the pieces and connect using tabs and holes. Includes illustrated instructions. HIGHLY DETAILED ETCHED MODEL – Display your 3D model once completed - collect and build them all.