Which replacement tyres for a 14" Carrera Kraken?

I have just purchased my wife a second hand 14" Carrera Kraken MTB.
This currently has a pair of Continental Vapour tyres (26"x2.1), which are rather heavy with a deep tread. As my wife hasn't ridden in over 20 years and as we only intend to ride light trails, towpaths and roads, I wondered if it would be worth while changing the tyres over to something lighter and with less tread, to make the ride easier for her.
Can anyone recommend a particular tyre, that would suit these environments without being too fragile and puncture prone?
Many thanks for your help in advance.
This currently has a pair of Continental Vapour tyres (26"x2.1), which are rather heavy with a deep tread. As my wife hasn't ridden in over 20 years and as we only intend to ride light trails, towpaths and roads, I wondered if it would be worth while changing the tyres over to something lighter and with less tread, to make the ride easier for her.
Can anyone recommend a particular tyre, that would suit these environments without being too fragile and puncture prone?
Many thanks for your help in advance.
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http://www.on-one.co.uk/i/q/TYMIMTBXCAT ... at_folding
+ some other bikes.