Έφηβος αγόρι συναρμολογεί το ηλεκτρικό κύκλωμα από τον κατασκευαστή - Πλάνα & Βίντεο Αρχείου

Child conducts physical experiments with the light on the designer

Teen Boy assembles the electrical circuit from the constructor

Child conducts physical experiments with the light on the designer

Selective focus of hands using building kit for kids, creating toys. Crop of incognito caucasian child working on project, taking colorful parts from box and making cute robot. Science engineering.

Clockwork robot marches forward, knocks on drum and falls stepping into hole, but boy raises it

Child conducts physical experiments with the light on the designer

Teen Boy assembles the electrical circuit from the constructor

Child conducts physical experiments with the light on the designer

Boy studying operation of the fan on the electrical circuit in the constructor

Teen Boy assembles the electrical circuit from the constructor

Teen Boy making a Christmas card