LEGO is always great but sometimes expensive, but I've found better prices on these sets at Revain a few times. This is the place to look first.
655 Piece Robot Building Kit For Kids - 6-In-1 Military Vehicle Engineering Set With STEM Learning Bricks - Perfect Toy For Boys And Girls Ages 4-8 By PANLOS
27 Review
STEM Learning Building Bricks Toys - 832 PCS 8-In-1 Robot Building Kit For Kids, Including Armored Police Car Engineering Construction Vehicle Blocks Set, Ideal For Boys & Girls Age 4-8
14 Review
City Police Station Building Kit With Cop Cars, Police Helicopter, Prison Van, Fun Police Toy For Kids, Best Roleplay Police Department Construction STEM Toy Gift For Boys Aged 6-12 (808 Pieces)
23 Review
80 Piece Quercetti Tecno Building Set
14 Review