Try having a go at these activities

• Developing a Tripod Grasp Advice
• Colouring development
• Developing early writing skills
• Improving Fluency and Correct Letter Formation
• Letter placement and orientation to the line
• Pencil pressure
• Distal Finger Control

Useful aids/adaptations

• Triangular Pencil Grip
• Tri-go Pencil Grip
• Ultra Pencil Grips
• Cross-Guard Ultra Pencil Grips
• Stabilo Easy Graph Pencils
• Stabilo Easy Ergo Pencils
• Stabilo Move Easy Pens
• Write Angle writing slope

Useful links

National Handwriting Association – Charity promoting good practice in handwriting (nha-handwriting.org.uk)