| Smooth and Rough by Angela Royston (2003) |
| Clean and Healthy by Angela Royston (1999) |
| Solids, Liquids and Gases by Angela Royston (2001) |
| Hot and Cold by Angela Royston (2001) |
| Sound and Hearing by Angela Royston (2001) |
| Transparent and Opaque by Angela Royston (2003) |
| Light and Dark by Angela Royston (2001) |
| Forces and Motion by Angela Royston (2001) |
| Ramps and Wedges by Angela Royston (2001) |
| Birth and Reproduction by Angela Royston (1997) |
| Boats and Ships by Angela Royston (1997) |
| Natural and Manmade by Angela Royston (2003) |
| Maps and Symbols by Angela Royston (1999) |
| Internet and E-Mail by Angela Royston (2001) |
| Shiny and Dull by Angela Royston (2003) |
| Water and Fiber for a Healthy Body by Angela Royston... |
| Diggers and Dump Trucks by Angela Royston (1991) |
| Telephone and Fax by Angela Royston (2001) |
| Horses and Ponies by Angela Royston (1997) |
| Wheels and Cranks by Angela Royston (2001) |
| Plants and Us by Angela Royston (1999) |
| Thinking and Feeling by Angela Royston (1997) |
| Soft and Hard by Angela Royston (2003) |
| Heavy and Light by Angela Royston (2003) |
| Flowers, Fruits and Seeds by Angela Royston (1999) |
| Pulleys and Gears by Angela Royston (2001) |