Delta sells kits, equipment, and books for hands-on science learning. Delta has some interesting but expensive kits for classrooms, but home educators will likely be more interested in the smaller Science in a Nutshell kits. Also, teacher's guides for the larger kits are available separately so you can put together your own kits with materials from Delta and do the same experiments. Examples of the Science in a Nutshell kits: Detective Lab, A Peek Inside You, One and Only You, Earth and Sun, Flowering Plants, Ponds and Streams, and Wheels at Work. Each kit ($62) has from eight to twelve activities, materials for one to three students, an activity guide, and three student activity journals.