The Floor GrandpaMemories are made on the floor.

Operation: Marshmallow Marksman

Supply Manifest

Everything to build two rifles and two pistols. Buy ½-inch Schedule 40 only — Schedule 80 looks the same outside but the hole is smaller, and marshmallows jam.

As an Amazon Associate, The Floor Grandpa earns from qualifying purchases. It never changes the price you pay. Links open Amazon in a new tab. Prices are typical ranges and change often.

Pipe & fittings (required)

Check the printing on the pipe and fittings: it should say SCH 40 and ½" (or 1/2 IN).

  • ½" Schedule 40 PVC pipe, 10 ftNeeded
    1 stick = 2 rifles + 2 pistols · $4–7 locally
    View on Amazon

    Every blaster in the book is built from this one size.

    Tip: Usually much cheaper at a local hardware store than online.

  • ½" Schedule 40 PVC teesNeeded
    6 for 2 rifles + 2 pistols · $8–14 / 10-pack
    View on Amazon

    The joint where the barrel meets the air chamber.

  • ½" Schedule 40 PVC 90° elbowsNeeded
    8 for 2 rifles + 2 pistols · $7–12 / 10-pack
    View on Amazon

    Handles and the turn from mouthpiece to body.

  • ½" Schedule 40 PVC end capsNeeded
    6 for 2 rifles + 2 pistols · $6–10 / 10-pack
    View on Amazon

    Close off the handles so the air goes where it should.

  • Mini marshmallowsNeeded
    1 bag per blaster · $2–3
    View on Amazon

    The ammo. Keep a separate clean bag for eating.

    Tip: Any grocery store.

Tools

  • Ratcheting PVC pipe cutterNeeded
    1 · $12–20
    View on Amazon

    Clean, square cuts in two seconds with no sawdust. Worth it if you’ll build more than one.

  • Fine-tooth hacksaw (alternative)
    1 · $8–15
    View on Amazon

    Works fine too — clamp the pipe and go slow so the cut stays square.

  • Deburring tool or sandpaperNeeded
    1 · $6–12
    View on Amazon

    Burrs inside the pipe catch marshmallows; burrs outside scratch hands.

  • Tape measure + fine-tip markerNeeded
    1 · $6–12
    View on Amazon

    A kid job: measuring and marking the cuts.

  • All-in-one PVC cement (optional)
    1 small can · $6–10
    View on Amazon

    Only if you want permanent joints. Grown-up job, with gloves; cure 24 hours and wash before use.

Safety (required for games)

  • Kids’ safety glassesNeeded
    1 per player · $10–16 / 4-pack
    View on Amazon

    Everyone on the field wears them in any game where people are targets.

  • Adult safety glassesNeeded
    1 per grown-up · $8–14 / pack
    View on Amazon

    For cutting, and for Range Officers in the line of fire.

Decorate & upgrade

Optional. The upgrades chapter uses a few extra fittings.

  • Colored duct tape
    2–4 rolls · $10–18 / multipack
    View on Amazon

    The no-mess way for kids to decorate their own blaster.

  • Spray paint made for plastic
    1–2 cans · $7–10 each
    View on Amazon

    Camo or team colors. Grown-up job, outdoors; paint the outside only.

  • ½" PVC 45° elbows
    pack · $6–10
    View on Amazon

    For the dual-45° mouthpiece upgrade.

  • ½" PVC 3-way corner fittings
    pack · $10–16
    View on Amazon

    Used in the Upgrades chapter.

  • ½" PVC wye fittings
    pack · $8–14
    View on Amazon

    Used in the Upgrades chapter.

  • Bright white cardstock
    A few sheets · $8–12 / 100
    View on Amazon

    Print the knockdown targets on cardstock so they stand up.

Don’t have the kit yet?

The supplies are only half of it. The printable kit has the steps, the printables and the grown-up playbook.

About Operation: Marshmallow Marksman →

Enlist for the next mission

A free printable to start, then a short note when a new project or adventure is ready. For grown-ups — unsubscribe anytime.

This list is for adults (parents and grandparents). We never ask for information about children. Privacy