How many pieces does the LEGO Robotics Discovery Set (9735-1) have?

The LEGO Robotics Discovery Set set (9735-1) contains 390 pieces. It was released in 1999 as part of the LEGO Mindstorms theme.

How can I find missing parts for LEGO set 9735-1?

On BrickMissing you can check which parts from the LEGO Robotics Discovery Set (9735-1) you already own. Add your LEGO collection and we'll show exactly which of the 390 pieces you're missing and which you already have.

Can I build the LEGO Robotics Discovery Set with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 390 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Robotics Discovery Set from?

The LEGO Robotics Discovery Set (9735-1) belongs to the LEGO Mindstorms theme. You can browse all Mindstorms sets on BrickMissing to find more sets from this theme.

Robotics Discovery Set

9735-1 Mindstorms 1999 390 parts 7.3% catalog rarity Intermediate

Robotics Discovery Set (9735-1) is a LEGO set with a listed count of 390 parts. Available inventory data is shown below.

Parts Inventory

🧱 390 parts

Showing the first 12 rows of the parts list (390 pieces in total). The full list loads automatically.

Color	Qty	LEGO price each
Light Gray	4×	Check price → View
Green	2×	€0,12 View at LEGO → View
Blue	2×	€0,29 View at LEGO → View
Black	4×	Check price → View
Blue	4×	Check price → View
Black	2×	€0,07 View at LEGO → View
Blue	4×	Check price → View
Black	13×	Check price → View
Light Gray	2×	Check price → View
Light Gray	2×	Check price → View
Blue	10×	€0,22 View at LEGO → View
Blue	2×	€0,13 View at LEGO → View

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Catalog rarity

How common are the parts in Robotics Discovery Set?

7.3%Moderate rarity

more commonless common

8 of 109 recorded part+color combinations appear in 3 or fewer sets in our catalog. This does not measure replacement availability or price.

Theme average

8.4%

All sets

6.7%

Least common in our catalog

Hub, Scout Brick [Complete Assembly] · Blue · only this set in our catalogWheel · Dark Turquoise · only this set in our catalogWheel 20 x 30 Balloon Medium · Dark Turquoise · only this set in our catalog

How we calculate this →