Is your child learning to write? If so then give them a little head start with this set of 3 pencil grips. eBay store: beautifulhomeland are selling them for just 99p delivered. Much cheaper than you'll pay on the High Street.
If you use the link above, you'll see they have a choice of different styles. The best ones that my son got on with was "A2".
These ones have bits for your index finger and thumb to fit in, to perfect the best pencil grip for writing.
The others are useful too, but I would say for complete beginners - preschoolers- I'd use the "A2" type, as it shows them precisely where to grip the pencil.
Delivery is FREE, but is from China so I would give it 2-4 weeks before your item arrives.