Why not get your young botanists to keep a Darwin-inspired daily journal filled with observations, measurements, daily watering logs (time of day and quantity), growth charts, pictures, pressed leaf samples and drawings. The possibilities are endless and the end-product only limited to one’s imagination.
Next thing you know it will already be time to thin out your seedlings to allow your little radishes plenty of space to grow - around 2.5 cm apart should suffice. Feel free to add the leaves of the seedlings that did not make the cut in your next salad. Let the kids know that if the bright red balls start making an appearance above the soil level there is no need to cover them up, they are quite happy where they are. They will be ready to eat between three to six weeks and although the taste of radishes is an acquired one, kids will be keener to try them if they have planted them from scratch.
Who knows, perhaps one day these moments will be looked back upon as a defining point in time when a passion for gardening began.