Just signed my kids up for Tuesdays at the May Center - any age group can go, classes are only $2 per child suggested donation. Everything from science to theatre.
See May Copmmunity Center "Fun Shine" summer program:
http://www.hcp4.net/ccenters/calendars.htm
Jesse Jones Park summer kids nature camps:
http://www.hcp4.net/jones/
Moorhead Blueberry Farm - pick your own blueberries
http://www.moorheadsblueberryfarm.com/
Miller Outdoor Theatre
http://www.milleroutdoortheatre.com
Library
http://host.evanced.info/harris/evanced/eventcalendar.asp?libnum=14
Houston Stay At Home Mom events page:
http://www.houstonsahm.com/events.html
Houston zoo
http://www.houstonzoo.org/
If you know of any other cool things going on in town - please email me, and I will add them to the list.
Thanks!
Jamie