Float or Sink EYFS KS1 Science PowerPoint and Activities

An engaging Float or Sink EYFS KS1 Science resource pack introducing floating, sinking, buoyancy, prediction and simple investigation skills through a practical water-themed lesson.

This ready-to-use pack is built around Captain of the Water: The Great Float or Sink Mission, where pupils become young scientists and help Marina the Merperson investigate why some objects float while others sink. The PowerPoint uses child-friendly explanations, prediction prompts, teacher demonstrations and hands-on challenges to make early science fun, practical and memorable.

Pupils explore key early science skills including predicting, testing, observing, sorting, recording and explaining what they notice. The resource includes activities linked to a water tray investigation, a wooden stick and stone demonstration, lolly stick and coin predictions, a foil boat challenge, a surface tension paper clip activity and a “Who Sank the Boat?” counting challenge.

What is included?

• 15-slide Float or Sink PowerPoint
• Teacher lesson plan
• Prediction and results worksheet
• Float or sink sorting cards
• Science vocabulary cards
• Marina’s Mission activity sheet
• Foil boat challenge sheet
• Who Sank the Boat counting mat
• Surface tension mini investigation
• Science results board
• Home learning challenge
• EYFS observation checklist
• KS1 exit ticket
• Classroom display poster
• Science certificate
• Teacher safety notes and SEND adaptations

Ideal for

• EYFS Understanding the World
• KS1 Science
• Reception and Year 1
• Water tray investigations
• Science Week
• Materials lessons
• Practical enquiry lessons
• Early years STEM activities

This pack supports curiosity, talk, prediction and early scientific thinking through an exciting practical lesson pupils will remember.

float or sink, floating and sinking, EYFS science, KS1 science, buoyancy, water tray investigation, materials science, early years STEM, science PowerPoint, prediction activity.