21 votes

Which LEGO part can build this?

Neither Brickset nor Bricklink knows of a part with number 3638, so it's unclear what you do not think it is. But I believe it's 3937 Hinge Brick 1 x 2 Base + 3938 Hinge Brick 1 x 2 Top Plate.
Henrik supports the community's user avatar
11 votes
Accepted

What is this strange and possibly old white 2x4 brick?

This is Brick, Modified 2 x 4 with Wheels Holder, Trans-Clear Bottom. White colored version was included in 77 sets.
Alex's user avatar
  • 23.2k
8 votes

Which LEGO part can build this?

As Henrik supports the community’s fine answer indicates, this is definitely 3937 Hinge Brick 1×2 Base + 3938 Hinge Brick 1×2 Top Plate, with both parts in white. The fact that these parts, as well as ...
KRyan's user avatar
  • 187
6 votes
Accepted

What color is this round plate?

The part is called Plate, Round 2 x 2 with Axle Hole (x Shape) and is known to exist in sets in 13 colors (quite more are for sale though). Based on this list and the color photos of all known blue ...
zovits's user avatar
  • 16.1k
4 votes

Identify part for a build aggg stuck

That's part 2436 "Bracket 1x2 - 1x4".
IvanSanchez's user avatar
  • 8,554

Only top scored, non community-wiki answers of a minimum length are eligible