Model size: 5.1 * 3.9 * 4.3 in (13 * 10 * 11 cm) Package size: 8.1 * 7.4 * 2.5 in (20.5 * 18.8 * 6.3 cm) Parts count: 120 Level: Easy Assembly time: 1-2 hrs

Number of components: 550 Level: Advanced

Number of components: 315 Estimated time of assembly: 5 hours Level: Advanced

Model size: 6.9 * 5.3 * 4.1 in (17.5 * 13.5 * 10.5 cm) Package size: 8.1 * 7.4 * 2.5 in (20.5 * 18.8 * 6.3 cm) Parts count: 163 Assembly time 1-2 hours

Wooden mechanical 3D puzzles by Ugears. Heavy Boy Set: Heavy Boy Truck VM-03 that moves without batteries, and Heavy Boy Truck Trailer VM-03. Assemble without glue. Perfect gift!

Number of components: 266 Estimated time of assembly: 6 hours Level: Advanced

Number of components: 340 Level: Medium Model size: 14.5 x 10.7 x 4.6 in (36.9 x 27.3 x 11.7 cm) Package size: 14.7 x 6.7 x 2 in (37.3 x 17 x 5 cm)

Platform 9 ¾™ model kit Model size: 23.4*10.4*9.5 in (59.5*26.5*24 cm Package size:14.9*6.7*1.3 in(37.8*17*3.3 cm) Number of components: 230 Estimated time of assembly: 3 hours Level: Medium

Model size: 7.8 x 9.5 x 4.6 in (19.8 x 24 x 11.6 cm) Package size: 14.7 x 6.7 x 2 in (37.3 x 17 x 5 cm) Electronic components: Yes Number of components: 295 Estimated time of assembly: 6 hours

Model Size: 9.3 x 9.3 x 7.9 in Package size: 14.9 x 6.7 x 1.3 in Number of parts: 325 Level: Medium Assembly Time: 6 hours Recommended Age: 14+

Number of components: 315 Estimated time of assembly: 6 hours Level: Medium

Model Size: 11.6 x 10.6 x 10.8 in Package size: 14.9 x 6.7 x 1.3 in Number of parts: 355 Level:  Advanced Assembly Time: 8 hours Recommended Age: 14+ Kit weight: 2.28 lbs