Camp Hours: 9 a.m. to 4 p.m. Extended hours available from 7 a.m. to 9 a.m. and 4 p.m. to 6 p.m. for an additional $10 per week. Have fun at MOSI during your school break! Celebrate the week with hands-on experiences and investigations. Bring two snacks and wear clothing that can get messy. Bring a lunch or buy one from the MOSI cafe. Preregistration is required. Attention: Please note that any promotional or multiple week discounts will not be indicated on the order submitted from this website. If your order qualifies for any of these discounts, they will be applied when your order is processed in-house by a MOSI Reservationist. A $2.50 processing fee will be applied to the final order. Please submit one order per child.