I've seen the Samsung Galaxy Tab 3 Lite 7.0 being heavily promoted by Asda for £89 on TV. It's only £82.99 from Expansys.
It's a decent tablet for the price and great for a child/teen this Christmas.
Wi-Fi, 8GB, White or Black available + UK Plug
• 7" screen with 1024 x 600 resolution
Clear, bright resolution for watching movies, surfing the Web, reading books and more.
• Android operating system
Productivity and entertainment at your fingertips. Download apps, games, movies, music and e-books from Google Play. Cloud integration provides a seamless experience across all Android devices.
• 8GB internal storage + microSD slot
Stores your music, movies, photos and more. Expand storage up to 32GB with a microSD card (extra memory sold separately).
• Dual-core processor
Delivers responsive performance, smooth streaming video and fast access to the Web and e-mail.
• 2.0MP rear-facing camera
Helps you capture decent shots.
• Sync contacts, music, videos and more
Share files, apps and content between Samsung devices for easy access to entertainment on any size screen.