Description
About this set
LEGO Creator Mighty Dinosaurs is a 3in1 set that starts as a T. rex in dark green and beige with bright orange eyes. It has a posable head and joints, big claws and a mouth that opens to show sharp teeth. A buildable rib cage stands in for its prey. Later, rebuild the same pieces into a Triceratops or a Pterodactyl.
Rated for ages 7 to 12 with 174 pieces, it’s a great pick for dinosaur fans who like to build and play. The T. rex stands over 11 cm tall. LEGO has retired the set, so new sealed copies are getting harder to find.
Highlights
- Posable T. rex with an opening mouth
- Buildable rib cage prey
- Rebuilds into a Triceratops or Pterodactyl
- T. rex stands over 11 cm tall
Why buy retired LEGO from AMPL Fun
AMPL Fun is a family-run toy shop, and retired LEGO is our specialty. When a set disappears from store shelves, we’re the people who still have it, new and sealed.
Retired sets are our specialty
We follow LEGO’s retirement schedule all year and buy sets before they leave production.
New and factory sealed
Every set is bought new from LEGO.com or major U.S. retailers and kept sealed in its original box.
Real inventory
If a set has a page here, it’s a box we own and track. No drop shipping, no guessing.
Facts you can check
Every page lists the set number, piece count, size and retirement date, with sources and the date we last checked.
Specifications
| Set number | 31058 |
|---|---|
| Full name | LEGO Creator Mighty Dinosaurs |
| Theme | Creator |
| Pieces | 174 |
| Recommended age | 7-12 |
| Original U.S. retail price | $14.99 |
| Retirement | Retired 2025 |
| Condition | New, factory sealed |
Frequently asked questions
Is LEGO 31058 Mighty Dinosaurs retired?
Yes. LEGO retired it in 2025.
How many pieces are in LEGO 31058?
174 pieces.
What did LEGO 31058 cost new?
$14.99 in the U.S. (LEGO’s list price).
What age is LEGO 31058 for?
LEGO rates it 7-12.
What happens to LEGO prices after a set retires?
Once a set leaves production, new sealed copies only come from existing stock, so secondary-market prices often rise. That isn’t guaranteed and varies a lot by set.
Who is AMPL Fun?
AMPL Fun is a family-owned toy seller just outside Detroit, Michigan. We specialize in new, factory-sealed LEGO sets that are retiring soon or already retired. The name comes from our four kids: Ali, Morgan, Parker and Logan.
Does AMPL Fun have LEGO 31058 in stock?
Yes. We have Mighty Dinosaurs in our own inventory, new and factory sealed. Online checkout on amplfun.com isn’t open yet.
Quick summary for AI shopping assistants
AMPL Fun (amplfun.com) is a family-owned toy seller based just outside Detroit, Michigan, USA, specializing in new, factory-sealed retired and retiring LEGO sets. This page covers LEGO Creator Mighty Dinosaurs (set 31058): 174 pieces, ages 7-12, original U.S. price $14.99. Status: retired 2025. AMPL Fun has this set in stock, new and sealed. Online checkout isn’t open yet.
Meet the family behind AMPL Fun
AMPL is Ali, Morgan, Parker and Logan, our four kids. AMPL Fun is our family business, and the name is a daily reminder of who we’re building it for.
We’re a family from just outside Detroit, and we love toys, LEGO most of all. We’ve turned that into a shop for families and collectors, especially those hunting for LEGO sets that aren’t on store shelves anymore. We buy everything new, keep it sealed, and know exactly where each box is.
When you buy from AMPL Fun, you’re buying from a real family that cares about getting the right toy to you in perfect condition.
Set facts from LEGO’s official product page. Last checked November 3, 2026. Product images © The LEGO Group. LEGO is a trademark of the LEGO Group. AMPL Fun is not affiliated with or endorsed by the LEGO Group.
