Where was the last time you want to the Butterfly house. The 16,000-sq.-ft. Sophia M. Sachs Butterfly House and Education Center features an indoor tropical butterfly conservatory (with more than 1,000 butterflies), outdoor native butterfly garden, gift shop and education center. $6 adults, $4.50 seniors, $4 children under 12, free for children 3 & under. Open Tu-Su 9 am-4 pm. located in Faust Park, at 15193 Olive Blvd. - Chesterfield, MO 63017 (636) 530-0076