Everything I've tested.

An early electric vehicle that was ahead of its time but ridiculous in practice, with a 15mph top speed, no weatherproofing and no reverse;…

34 models shook so violently that their tops flew off, leading to a recall of millions of units.

The launch version was glitchy, sent people to places that don't exist and stranded motorists in the Australian Outback.

An autonomous security robot packed with sensors that ran over a toddler, was knocked over by a drunk man and drowned itself in a fountain.

A handcuff-like watch with a 1.7 inch screen that couldn't do real smartphone tasks, a good meme but a poor product.

A working oven for children that was recalled after kids burned their fingers, though he marks it down as a fail since newer models are saf…

A 1950 kids' play set with real radioactive materials, which he rates 10 out of 10 for stupidity.

A chess robot that fractured a seven-year-old boy's finger, followed by poor responses from officials; 8 out of 10 fail.

A tone-deaf proposal to put taser drones in schools that caused ethics board resignations; it never reached production.

He thinks the 'full self-driving' name is misleading since it is only driver assist, and charging extra while hiding behind 'beta' is dodgy.

Its Circles feature was a hassle, and it launched late to a market where Facebook was simpler, making it a 4 out of 10 fail.

Apple's first smart device arrived about 20 years before handwriting recognition was good enough and cost a fortune, a 3 out of 10 fail.

A too-good-to-be-true $9.95 a month movie-a-day deal whose business model was fragile and led to bankruptcy; 9 out of 10 fail.

Used as the baseline to show how far phones have come, small and chunky and missing basics like a flash, selfie camera and app store.

Well-intentioned for self-protection, but it delivers far more pain than a normal stun gun and is banned in places.

A power bank shaped like a hand grenade, which will cause problems at airport security.

So powerful it is classed as a burning laser, and dangerous to eyes.

Just a lighter, but looking like a real gun almost guarantees trouble.

Looks cool on a custom car, but you will struggle to explain it to police who pull you over for imitating them.

Pricey but gives remarkably precise, thin and smooth slices, and works brilliantly with kinetic sand.

A strobe-light illusion that makes water appear to flow upward, which he found hypnotic and rated 8.5 out of 10.

Fluffy, moist sand that was satisfying to cut and shape, though he did not give a score.

Gave perfect slices and scored an easy eight out of ten.

A cheap kitchen gadget that worked well enough to earn a seven out of ten.