your preferred date and morning or afternoon session: Now open Thursday-Saturday from 10am-1pm (morning session) and 2-5pm (afternoon session) and Sunday from 12-4pm. Open Labor Day 10am-1pm and 2-5pm. Save on STEM gifts, toys and books this Labor Day weekend in our Science Store! 25% off select items through Labor Day starting September 3! Learn how we’re safeguarding the health of our guests, staff and community by following the latest state and CDC guidelines.