Katie Holmes is obsessed with playgrounds.  

The actress, who has a two-year-old daughter Suri with husband Tom Cruise, has developed an interest in children's outdoor recreational areas since becoming a mother.

She said: "We were in Berlin and I was impressed with their playgrounds. It's amazing what you become aware of as a mother.

You think, 'Nice wood on that swing set.' " Although she and Tom are one of the world's most famous couple's, the actress insists she is happy to do her own DIY and is a frequent visitor to Home Depot, one of America's biggest hardware chains.

She added: "I've been to the Depot many times with other moms. I know how to push a cart. I'm not a wimpy girl."

Katie, 30, also denied ever worrying about the "Terrible Twos" -- the allegedly most difficult age for a young child -- with Suri.

She revealed to new tome the 'Black Book of Hollywood Pregnancy Secrets': "I just hope she's not looking at me thinking, 'Mom, are the terrible 30s coming on with you?' "

(China Daily/Agencies December 22, 2008)