Roomba 606 base plate. Compatible with the modlos main circuit series 500 and 600
Amazon.com: Mould King Robot Toys with Remote Control&APP Control, 3 in 1 Changeable Electric Robot Building Sets of Robot Planet Explorer and Tank, STEM Projects Educational Gifts for Kids 8-16 Years(606 Pieces) :
User manual iRobot Roomba 606 (English - 32 pages)
606 Piece Technical 3 In 1 Remote Control Robot Model Set
Centre Roller Side Brush Hepa Filter for IRobot Roomba 600 Series 605 606 616 620 650 655 660 676 Robot Vacuum Cleaner|Vacuum Cleaner Parts| - AliExpress