So you want to get your children interested in astronomy or explore the stars on your smartphone? The Elecom Smartphone Telescope has you covered. It is a telescope that combines with your smartphone to let you watch the moon and other objects. Its lens offers a 35x zoom. It can go up to 140x when combined with your phone.
This telescope works with smartphones up to 6″. It measures about 420 x 145 x 180mm. This cardboard telescope is available for under $150 at this time.