Toyella are very good at hunting down unusual toys – such as these rather fabulous rainbow blocks by BioBlo. As the name suggests, these are eco-friendly, made from Biofasal, which is essentially a mix of sustainable wood chips and oil- and plastic-free materials which is completely recyclable – no wonder they won the 2015 Green Product Award. This limited-edition set comprises 204 blocks in red, orange, yellow, green, blue and mauve, opening up myriad rainbow building possibilities. The honeycomb design is also a nice touch, enabling the blocks to be laced together or even used to blow bubbles. They come in a box with carry handles, making them a lovely special birthday gift, Â£49.99, Toyella.