Marble run with bigger ball?

[erazerhead]

Can anyone recommend a marble run but with a ball that's big enough to not be a choking hazard? I've looked a few times and they're either dead expensive (£80ish) or there's one at Argos that you can only build in one set way rather than making your own marble runs!

My 3-year-old would love one but he has a baby brother and I'm also not convinced he wouldn't someone end up with a marble in his mouth so want to avoid any choking hazards. Any help appreciated!

I'd like one that's fairly big/complex rather than one for babies. Does such a thing exist?

The balls in this one are slightly larger than golf balls. www.amazon.co.uk/Advanced-Bridge-Marble-Educational-Toddler/dp/B01J779WSC/ref=pd_lpo_vtph_21_lp_t_3?psc=1&_encoding=UTF8&tag=mumsnetforum-21&refRID=XD29Q2RBT8DQ23YC1G5P There's no particular track to build, but you don't get very many pieces in a kit so there aren't masses of options. I'd suggest buying two kits so you have more pieces and can make more exciting tracks.