Would it work with marbles if the little coaster car gets lost?

Sort of works for some track configurations. Marbles are faster than the car and jump the track easily.

is it too difficult for a 6 year old?

My son received it at about 6 1/2. He liked building with it for fun, but without the guiding cards. As he got more familiar with the pieces, he started trying the easier builds and really enjoyed it. I would say if your 6 year old is a builder and already completing Lego sets for older kids (8+), they would enjoy growing with this game. Hope that helps.

Can 2 sets connect together?

that is a great question! there is no scaffolding to connect the black bottoms but there is nothing preventing you from putting them side by side and attaching the pieces from one set into the next

For older kids, such as 5th graders, do you recommend combining 2 kits for them to have more pieces to work with or is 1 kit enough (won't be bored)?

Not really. This is a game, not a building set. You get cards that show you the puzzle and you have to "solve it" by building something that meets the build requirements (i.e. what shows on the card). So having more pieces won't do anything extra for those puzzles. Now, if you want to approach this as a builder set and just let the kids build what ever they want, then more pieces could be good. But I wouldn't recommend it.

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ThinkFun Roller Coaster Challenge Logic Game for Kids Age 6+

Product ID: 47971425

Details

Age range (description)
Little kid Big
Brand
ThinkFun
Material
Plastic
Number of players
1+
Theme
Educational

🎢39 track pieces for dynamic builds

🧠50% logic game, 50% creative STEM fun

🧩40 brain-teasing challenges included

RM464

Duties & taxes included

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Description

🎢 Build, Brainstorm, Beat the Challenge — STEM Fun That Rolls!

SOLO PLAY INFINITE FOCUS - Perfect for independent play, fostering concentration and problem-solving in a screen-free environment.
ENDLESS CREATIVE POSSIBILITIES - 39 track and 36 post pieces let kids design unique roller coasters that defy boredom.
CHALLENGE ACCEPTED FUN GUARANTEED - 40 progressively tricky puzzles keep kids engaged and eager to conquer the next level.
MASTER STEM SKILLS WITH EVERY BUILD - Combines hands-on roller coaster construction with critical thinking challenges to sharpen your child's mind.
PORTABLE BRAIN BOOSTING ENTERTAINMENT - Compact, lightweight design means STEM fun can go anywhere — from playroom to park.

ThinkFun Roller Coaster Challenge is a STEM-focused building and logic game designed for kids aged 6 and up. Featuring 39 track pieces, 36 posts, 2 tunnels, and 40 challenges with solutions, it blends creative construction with critical thinking. This single-player game encourages independent play while developing problem-solving skills, making it an educational and addictively fun experience that fits perfectly into any young learner’s toolkit.

Specifications

ASIN	B071KT3MSN
Age Range Description	Little kid, Big kid
Best Sellers Rank	25,635 in Toys & Games ( See Top 100 in Toys & Games ) 625 in Board Games (Toys & Games)
Brand Name	ThinkFun
Colour	Multicolor
Container Type	Box
Country Of Origin	China
Customer Package Type	Standard Packaging
Customer Reviews	4.5 4.5 out of 5 stars (2,621)
Educational Objective	Creative Skill, Critical Thinking, Problem Solving, To Build
Global Trade Identification Number	00019275010461
Grenre	Educational, Family
Included Components	39x Track Pieces, 36x Post Pieces, 2x Tunnels, 40x Challenges with Solutions, Game Grid, Instructions
Is Assembly Required	No
Item Dimensions	27.9 x 7 x 29.4 centimetres
Item Dimensions L x W	25.6L x 25.6W centimetres
Item Type Name	game
Item Weight	1.3 Pounds
Language	English
Manufacturer	Ravensburger
Manufacturer Part Number	1046
Manufacturer Warranty Description	2 year manufacturer
Manufacturer recommended age	0 - 10 years
Material Type	Plastic
Model Name	Roller Coaster Challenge
Model Number	1046
Model Year	2016
Number of Items	1
Number of Packs	1
Number of Players	1+
Operation Mode	manual
Other Special Features of the Product	Portable
Package Quantity	1
Power Source	Manual
Product Style	Classic
Set Name	Roller Coaster Challenge
Size	68.58 cm x 6.99 cm x 29.91 cm
Subject Character	ThinkFun
Theme	Educational, Humor
Unit Count	1.0 count

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TrustScore 4.5 | 7,300+ reviews

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