Love this. It’s Miclik, a construction toy orginating in Spain. They’re basically coloured hinges that can clip together at different angles to each other and layer upon layer. A single design that provides scale, volume, flex and motion in all directions. The layering when building provides an inherent strength and robustness. And because the raised pins are the perfect size for a hole punch, the kids can can punch out card, paper or plastic extensions and integrate them with their Miclik designs by sandwiching between two hinges. That is an invitation to create if ever I have seen one! Each set has 48 pieces in four colours. Brilliant. £22.99 from Toyella.