Modern people take it for granted that they can fly anywhere on earth in a matter of hours, or that phones are used for everything except calling people. Marvel at the miracle of aeronautics with this Groupon. Choose Between Two Options $17 for museum admission for two (up to a $34 value) $34 for museum admission for four (up to a $68 value) In early November, the new Charles Simonyi Space Gallery will reopen with a just-assembled space-shuttle trainer and related exhibits. Children aged 4 and younger are regularly admitted for free; youths 5â€“17 are regularly admitted for $9. Prices vary according to age, group size, and military status.