Plant a pot with your Rainbows and watch it grow
A packet of seeds
Small plant pots
With the, Rainbows follow the instructions on the packet for planting the seeds. Water the pots well and leave in a warm, sunlit spot such as a windowsill to germinate. This should happen quite quickly. Keep the pots well watered and when the plants have outgrown the small pots transplant them into the larger pots or, if the option is available, straight into the garden.
Or - Place a sponge soaked with water in a plastic bowl/plate and sprinkle it with birdseed. Place the plate in a sunny place and wait for the seeds to sprout! Keep the bowl/plate regularly topped up with water.