If you would like to spoil the youngest family members with a sandbox in the garden, you can build it yourself with Frøslev system fencing profiles. We have made a proposal for a sandbox - but obviously, it can also be built with entirely different dimensions.
Get building instructions and see the consumption as well as simple step-by-step instructions.
When using pressure-impregnated wood, we recommend that you line the inside of the sandbox with an effective pool foil or similar to avoid direct contact between sand and wood.