Kretrum 32 Colors 3D Doodler Pen Refills for 3Doodler Start+ 3D Pen Low Print Temperature 2.5mm PCL Filament Only for 3Doodler Start 3D Pen Each Color 15.2cm x 5 pcs Total 160 pcs

Works perfectly well with the children's 3D doodle pen. Great alternative to the expensive own brand refills. Comes in a variety of colours. Child didn't have a hard time finding the colours she wanted. Will purchase again.

Good value and good selection of colours, granddaughter loves them

Works well with 3D DOODLER pen. Lots of fun to be had.

Great item

What a great selection of filaments colours, for the price they are nice and long as well so will last well on the 3D pen. My granddaughter had one for Christmas and this has set her up really well and I’m sure will last a long while. Easy to load in to the pen and can be changed easily as well.

Excellent selection of colours for my daughters 3d pen. Do the job perfectly

I got the size reccomended by the 3d pen but none of these fit. The plastic is too big and too hard so it doesn't melt and I cant use them

Great present, along with the pen for my grand daughter, she’s very happy.

This PCL filament refill pack is a fantastic value for anyone with a low temperature 3D pen. The variety of 30 colors is impressive and really opens up the creative possibilities for projects. I found that they fit my Kretrum 3D pen perfectly and fed through without any jamming or push back. The plastic melts evenly and cools at a good rate, which is essential for building 3D structures. I did find that some of the colors were a little bit more duller once they went through the pen, but that is to be expected. I haven't used all the colors yet, but I'm sure once I find a little more extra time and some creativity, that this pack will come in handy!

Super bien, los colores son muy vivos y guapos. Super recomiendo.

Dieses Produkt hat tolle Farben, und passt perfekt in den kids Stift rein. Der Preis ist leider etwas höher Gegensatz zu anderen nachfüll Farben.

Excelente

Design & Build Quality 🧰 This 100-piece filament refill pack is well-cut and consistent in size. Each stick is made for the 3Doodler Start+ and comes in a soft pastel shade that’s attractive even in normal light. The resealable pouch is a practical touch, helping keep unused pieces dry and organized. That said, the plastic quality feels generic, with no markings or identifiers on the sticks themselves. Ease of Use 🔧 These filaments fit the 3Doodler Start+ without issue, but only that model. The 2.5mm diameter is completely incompatible with standard 3D pens. If you don’t own a 3Doodler Start+, this won’t work for you—there’s no workaround. Feeding is smooth, and there's no sign of jamming if your pen is in good shape. Performance in Real Life ✨ The glow effect works, especially for the yellow and green filaments, which charge quickly and emit the strongest light. After even brief exposure—like 5 minutes under a flashlight—they glow brightly at first. However, the glow fades significantly within an hour regardless of how long you charge them. 🎨 The plastic color has almost no relation to the glow color. Even purple or blue pieces glow in a generic green-yellow tone. Still fun for kids, just don’t expect vivid, color-accurate effects. Notable Issues ⚠️ The filaments emit a strong, unpleasant smell when melting. While this is common with PCL plastic, this batch is worse than average. It’s not unbearable, but it’s sharp and chemical enough to be a concern—definitely use in a ventilated space. 🚫 These won’t work in any other brand of pen. Compatibility is extremely limited, and there’s no warning label on the sticks themselves. You must keep the packaging or risk confusing them with other filament types. Final Verdict 📌 If your child already has a 3Doodler Start+ and you want to add some creative glow-in-the-dark fun, this refill pack is a good, reasonably priced option—with caveats. The glow is brief but effective. The smell is unpleasant but manageable with airflow. 💡 Buy this only if you’re fully committed to the 3Doodler Start+ ecosystem and have a safe workspace. Otherwise, look for safer or more versatile alternatives. Recommended with reservations.