Legoland® Discovery Center Osaka targets children aged 3 to 10, so adults (16+) alone or children (15 and under) alone cannot enter—please note. For LEGO fans aged 18 and over, an adult-focused event called “Adult LEGO Night” is held twice a month at night. Standard admission is 2,300 yen for ages 3 and up, and free for ages 2 and under. Three types of annual passes are also sold, so LEGO lovers should check them out.