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Physics and engineering. Build a bridge, then send everything from a bike to a freight train across it.
Play nowFractions, grades 3 to 5. Slice and top pizzas to match each customer's fraction order.
Play nowElectricity, grades 6 to 8. Wire batteries, switches, and bulbs into a loop that really works.
Play nowDoing real, confirmed service at Service Quest earns titles, and every title comes with a code. Type a code here to unlock fun extras in these games. The games are free for everyone; codes only unlock toys, never admission.
⭐ Service Star: you earned the top title at Service Quest. Thank you for serving.
🧸 Preschool (3 to 5): first games on the way: Counting Critters, Shape Safari, Letter Sounds Zoo.
✏️ Elementary (K to 5): Bridge Builder (upper elementary), Fraction Pizza Party (grades 3 to 5).
🔬 Middle School (6 to 8): Bridge Builder, all levels, and Circuit Builder.
🎓 High School (9 to 12): Bridge Builder, Canyon Haul: full materials and the freight train.
Free and open to everyone. The neighbors across the river are waiting for supplies. Build strong, spend smart, and get them across.
What you learn: triangles make structures strong, materials behave differently under pulling and pushing forces, and every design trades strength against cost.
The game loads when you tap start, so the page stays light.
Build a bridge, then send a vehicle across. Tap a dot, then another dot, to place a piece.
Road is the driving surface. Wood is cheap and weak. Steel is strong and pricey. Cables only hold when pulled tight, so hang the road from them. Heavier vehicles earn more stars, and stress turns pieces orange, then red, before they snap.
Grades 3 to 5. Customers order fractions of a pizza. Cut the slices, add the toppings, and serve the exact fraction they asked for.
What you learn: a fraction is a part of a whole, the bottom number is how many equal slices the pizza is cut into, and different fractions can be equal: 1/2 is the same as 4/8.
The game loads when you tap start, so the page stays light.
Cut into how many slices?
Topping tool
Pick a topping, tap slices to add it, then serve.
😊 Customers served: 0 · 🔥 Streak: 0 · 🏆 Best streak: 0
Grades 6 to 8. Wire a battery, bulbs, and a switch into a loop that really works. The board runs on the real rules of electricity, so if a wiring would work on a real bench, it works here.
What you learn: electricity needs a complete loop, a switch opens and closes that loop, bulbs in one shared loop (series) split the push and glow dimmer, and bulbs with their own loops (parallel) each get the full push. A wire straight across the battery is a short circuit.
The game loads when you tap start, so the page stays light.
Tap a metal dot, then another dot, to run a wire. Tap a wire to remove it.
Quick guess: if both bulbs share one loop, will each glow brighter, dimmer, or the same as one bulb alone?
Free means free. Every game here is free for every kid, at home or in a classroom. There are no accounts, no ads, and nothing to buy inside a game.
Learning by doing. Each game teaches by trial: build it, test it, watch what happens, try again smarter. That loop is the lesson.
Progress stays on the device. Bridge Builder saves your bridges and stars in this browser only. Nothing about a player leaves the device.