SenTub Get to grips with grammar and construct sensational sentences with these sets of foam jigsaw pieces. Children will have fun constructing simple or complex sentences whilst building their writing skills and knowledge of vocabulary. The original set contains words colour-coded according to their classification. Nouns, blue. Verbs, red. Adjectives, green. Adverbs, peach. Prepositions, purple. Pronouns yellow. Conjunctions, pink. Determiners, gold. Punctuation, grey. The booster kit contains a top up of conjunctions, punctuation and commonly used words. Both kits come in a handy storage tub.