One of the easiest Science Experiment to do with kids is to plant a vegetable or flower from seeds. That is real life science. Kids can water and watch the plant grow. A real life 'experiment' like that teaches young children about how plants grow much better than any interactive game, educational app, TV program or computer software can ever teach.
Practical and day to day Science for Kids projects like planting seeds are simple and not time consuming at all.
So, when my kids picked up some seeds at the hardware shop, I couldn't say "No" when they said "We want to plant broccoli, mum." We bought them the broccoli seeds and allowed them to plant them into their own pots and this is what we got.
Now, will the real broccoli please stand up? We had two different types of plants growing from our broccoli seeds and I don't know which is the broccoli. Does anyone know?
Other Fun Things To Do With Kids
Home Science Experiment - Germinating Bean Seeds
Home Science Experiment - Growing Plants From Stem Cuttings