Popsugar Parenting Parenting Gift Guide Best Gifts For Tweens The 25 Best Tween Gifts of 2019 Are Here 6 November 2019 by Kara Kia View On One Page Photo 5 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Thames & Kosmos Crystal Growing Kit They can conduct up to 15 cool experiments with this Thames & Kosmos Crystal Growing Kit (£30). Thames & Kosmos Crystal Growing Kit £30 from argos.co.uk Buy Now Previous Next Start Slideshow Parenting Gift GuideGifts For TeensGifts For KidsTweens And TeensKid ShoppingGift GuideHoliday