Ananova:

Britney Spears has designed a £150,000 playground for her back garden to keep her fiancé's kids happy.

The singer, 22, ordered a pool with slides, giant playhouse, swings, roundabout and activity centre reports The Sun.

Britney will become stepmum to Kevin Federline's two-year-old daughter Kori and newborn son Kaleb if their wedding goes ahead.

A builder at her £3million house in Malibu, California, said: "She wants no money spared on the garden. She takes her role as stepmother seriously and can't wait to watch them having fun."

Shar Jackson, 25, who Kevin, 26, dumped for Britney said: "She seems nice and Kori likes her. I don't bear her ill will."

Britney is said to be marrying in Santa Barbara in November.

She reportedly cancelled a summer ceremony after a row with Kevin.