An activity where children investigate how much effort is needed to lift a load.

An activity where children measure the effort needed to lift a bucket of water with different pulley systems.

An activity where children feel how much effort is needed to lift a bucket of water with and without pulleys.

In this issue - 'Practical science – why it’s worth the effort!' - a message from the CLEAPSS Director, tips for “Working scientifically” in the new National Curriculum and updated guidance on keeping alpacas and llamas.